Process of manufacturing mastic sheet material



March 2 1926.

F. R. MULLER PROCESS OF MANUFACTURING MASTIC SHEET MATERIAL Filed April 16, 1925 Patented Mar. 2, 1926.

UNITED STATES i A 1,575,378 PATENT OFFICE.

FRANKLYN R. MULLER, OF LAKE BLUFF, ILLINOIS, ASSIGN OR T FRANKLYN R.

MULLER, ING, OF WAUKEGAN, ILLINOIS.

PROCESS OF .MANUFACTUIRING MASTIC SHEET MATERIAL.

To all whom it may concern:

Be it known that I, FRANKLYN R. MUL- LER, a citizen of the United States, residing at Lake Bluff, in the county of Lake and plasdc in small quantities and then repeat.

edly run through rolls of different thicknesses until, finally, a suitable sheet of material is secured. Manufacture on a production basis has been impossible in this crude manner, and the art has not been developed to any great extent.

The admixture of ingredients in the proc ess described has been wholly inadequate for the finished material has always.

been streaked and structurally weak. Rubher or other resinous material has been employed to cause the heterogeneous mixture of asphalt, gilsonite, silica, coloring material, and other ingredients to adhere more.

closely one to another when. used in larger perceutums and to add resiliency when used in small proportions by the addition of rubber has not solved the problem of manufactoring tiles, shingles, or other mastic sheet products.

A noyel process for the production of sheet mastic material has been developed after extended experiment, and in conducting such experiments and in the develop.

ment'of this invention, the following objects have been borne in mind A. process for the production of mastic tiles and other mastic sheet material ona' commercial basis;

An unique method for treating materials to roduce a mastic sheet wherein the inmixed;

A process gre ients are completely and thoroughly adapting to use the less expensive ingredients ordinarily employed in mastic sheet material manufacture for-the Application filed April 16, 1925. Serial No. 23,574.

purpose of reducing the material cost thereof;

A process of continuous manufacture of mastic sheets producing uniformity of prodnot, a hlgher quality sheet, and reducing labor costs;

The adaptation of materials for mastic sheets to animproved method of manufacture eliminating a proportion of binders and allowing a higher material; and V r A. wholly new process for producing mastic sheets introducing new steps or stages in the manufacture thereof whereby higher quality and greater uniformity are obtained, and the production may become a continuous process.

These objects, and such other objects as may hereinafter appear, are obtained by the novel steps employed in the process now to be described, and which is somewhat diagrammatically illustrated in the accompanying sheet of drawing in which Figure l is a schematic layout, in elevation, of machinery employed in carrying out the process herein described.

In a factory for the production of mastic sheets by the process comprising the invenper-centum of filler tion, two floors are desirable. Stills for the Mixers for the mass are of a mechanical type for the handling of'heavy materials inlarge quantities and are also steam jacketed. The mixer gr mixers) empty into a chute delivering e plastic mass to a hopper leading to forming rolls carried in a before "passing through the forming rolls.

Each of the forming rolls is internally press on thefloor-below, the rolls being adterial.

' rolls to distin A second conveyor belt conveys the mate- 7 rial from the first set of squeeze rolls to a second set, which are squeeze rolls but in this description will be called finishing ish them from the set, of squeeze re s. "The belt conveyor last mentioned is disposed in a panand causes the sheet material to be immersed in the water or other material therein contained for a portion of its journey from the squeeze rolls to the finishing rolls. Hot or cold water may be supplied to the pan and the pan may be equipped -with temperature maintaining or re latin'g devices. J

Adjacent the finishing rolls there may be a cutting device. A member having a plurality of cutting edges, generally the outhne. of the object being manufactured, is M ranged upon an eccentrically actuated carrier which is adapted to travel with the sheet material at the speed ofjsuch material during the entire cutting plrocess. T Said carrier lifts the cutters w en the cutting is completed and returns them to cutting posimaybe disposed tion. Adjacent the travelling cutter is a' belt conveyor for carrying away the cut ob-' jects and the waste. The waste is usually collected and mixed with succeeding batches The said mixer 10 discharges through floor ll into a: chute 13 which empties into a hopper 14 leading to a pres 15 having forming rollers marked 16, which rolls 16 are ad ustable. The instrumentalities for adjustment are clearly shown and marked 17.

A conveyor belt 18 advances the sheet'material passing through the forming rollers 16 to squeeze rollers 19 from whence the sheet material is conveyed through water or other liquid, contained in a' pan 20 by a second belt 21. l v

' A set-of finishin rollers 22 receives the material from the ath 20, and after such material has passed therethrough, it ma be run through a cutting device, designate 23. An integral or sectional frame upon which the apparatus on the lower floor 12 is mounted, is designated by the numeral '24.

The process is carried out by mixing the necessary ingredients in the steam heated mechanical -mixers. Waste from previous operations may be added thereto or used in producing a batch of plastic material. The

material when thoroughly plastic- -about like bread dough in its lastioityis discharged into the hopper a out the forming rolls. -The hopper is heated by a steam jacket. The forming rolls are cooled (ordinarily) by water. Cold rolls absolutely prevent adhesion of the material theretov andgive a chilled surface to the sheet which assists in. the further stepsof manufacture. Sheet materialpasses from the forming of i di t I t l d ti th rolls onto .a conveyor belt and is conveyed to is no material waste whatever for the waste may be rendered lastic and used (iver again.

and-the travelling cutter upon a suitable. longxtudlnal frame, and all arts" driven by a sm le The several ro prime mover. If t is done, eacli of e squeeze rolls should be geared atjdlfierent speed so as to take up' exeessmaterial which may gather upon the several conveyors. -Each set of rolls being closer together 1 causes the -sheet' material to collect at its 'own' dr1 the receivin" side" unless each succeeding set of rolls as a slightl increasedspeed. It is better to provide ea set of rollswith unit, the driving unit for the ro also actuating the travel ling cutter. More sets of rolls may be emloyedwhere -.desired but the lay-out here 7 has been found commercially practicable. The typical lay-outjust referred to and illustrated in the accompanying single sheetj of drawing which "is in :e'levation comprises,

- asis shown, amixe'r-lO upon an upper floor 11,- which is adaptedto the squeeze rolls where the surface of the material is smoothed and the sheet further reduced in thickness. The material is still quite plastic under ordinary conditions when it passes through the squeeze rolls.

From thesqueeze rolls, the sheet is-carried upon .a bcltconveyor through a. water bath to the finishing rolls.- The water in the bath or pan may be warm to keep the" the latter to be returnedto the mixer.

' A continuous'proces of manufacture for mastictile, etc. and other objccb is Batches of mastic may be made uniform 1 for each ingredient, may be carefully measured or weighed and the remixed ma-- sulting'article of manufacture is-alao'uni form. Ad uate mixing is had and 'production can speeded up to admit of com-.

mriigrcialfiise. f mu h I teuseoanan'ary oppen m I the forming rolls'and of heaters comprising a shaft having thereon a plurality of variously shaped arms arr verselyof sai hop r, a veined or -marbled eflect in the finis ed sheet may be had. This, of course, necessitates th use of differently shaded mastics, beaten in difierent mixers and come ed in prslper proportion,

to the forming ro ers and o mixed before pressing.

partially ad- None of the, deficiencles of the previously employed processesof mastic manufacture '30 throughout, an impossibility heretofore.

Irr place of tile cutters, slitters may be employed when lengthsof sheet mate.- rial are-desired, Slitters comprise circular rotating knives ada tedto cut'the ni'aterial .35 longitudinally of t 'ecourse of its travel from theueeze rollers.- Ordinarily such.

rotating kmves are opposed and arranged in gangsupon shafts, the space between knives-determining the width of. the mastic.

concrete roads.-

' I claim:'-

" transto form plastic 'tic" material which comprises m gfigmient results. A

finishing rolls, and a' eutting'devi sheet. Such engths are used as 40 i for expansion strips inv for, stair treads and u *1'. A process of sheet mastic which includes heatmgand mixing thein- 45 gredients thereof, passing the. lastic mate 'rial thus produced through chi ed' forming,

rolls squeeze rolls and a water bath. 2."A; process of producing sheet mastie suitable for cutting into"'tiles. which includes the steps of inec amcally mixing and heating1the ingredients thereof batc es, successively deposit- 7 ing such batches in a heatedcontainer to be dischar ed therefrom between sheet" formingro andfpa'ssing the sheet material;

thus formed successively andwhile E1360 between squeeze rolls, a. water bath,

ing rolls, and a cutter device.

3. A process of manufacturing sheet masechanically mixin andheating a mass of ingredients. high 1n filler material and low in binder material, passing the plastic mass while still being heated through chilled sheet forming W --'rolls, and {subsequently passing the sheet thus'formed-through squeeze rolls, water,

a 4. The process of producing'a tile or the likew'hichcomprises mixing the in- -gredients inzthe presence of heat and while still being heated, forcing the mass through chilled h s heet.- forming rolls, and subsequently 'passingflgiofsheet thus formed and while still p cutter.

R. MDILER.

- shin les, etc.-, 50'

ie successively throu he squeeze rolls, a 'bath of water, finishing r0 and a travelling 

